PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site

 

Advertisement

Sherwin-Williams



The Development of Corrosion Resistant 2- and 1-K Waterbased Zinc-Rich Paints

From JPCL, August 2017

More items for Coating Materials

By Kenichi Nakamura, Roval, Japan; and Pascal Verbiest, Ph.D, EverZinc, Belgium

This article explains the formulation and performance of a waterbased (WB) zinc-rich paint, with 95-percent zinc content in the dry film, that is able to provide corrosion protection to steel equal to that of hot-dip galvanizing....


(Login to read the full article)

   

Tagged categories: Formulating; One-component coatings; Primers; Research and development; Two-component coatings; Waterborne coatings; Zinc

Comment from Mario Colica, (9/11/2017, 3:57 AM)

The comparation with hot dip galvanized surfaces 550gr/m2 is limited and partial. All technician know that the more the Zinc thichness the lomger is the resistence against rust. So if you employ thermal Zinc spray you can deposit up to 500 um 10 times more than HD galvanizing. No VOC problems with TSZn


Comment from Kenichi Nakamura, (9/13/2017, 9:41 PM)

Thank you for the comment. I can understand what you mean, but I think, thermal zinc spray requires very strict conditions such as ideal surface treatments. And it is not realistic to use it for large area or complicated area. On the other hand, cold galvanizing is easy to use in many practical situations.


Comment from Guy Decelles, (9/18/2017, 2:43 AM)

Intersting article, thank you. Have you considered the use of a Zinc flake pigment as oppossed to dust (spherical)? Best Regards


Comment from Kenichi Nakamura, (9/18/2017, 8:54 PM)

Yes, we use zinc flake in a solvent type paint. It has a lower electric resistance and a brighter color. However, it is generally covered with hydrophobic materials which are used in a manufacturing process. Therefore it is not compatible with a waterbased system. I wish it could be applied. Thank you for your comment.


Comment from HECTOR MEDINA, (9/19/2017, 8:54 AM)

In terms of surface prepartion Mr. Nakamura, what is the minimum requeriment for your product application? e.g SSPC-SP10, SP5 or a single SP3 or SP2?


Comment from Kenichi Nakamura, (9/19/2017, 8:21 PM)

In order to get the anti-corrosion performance that is equivalent to HDZ55, we recommend SP10 or SP5. However, this waterbased zinc rich paint could be compatible with SP3 or SP2.


Comment from David Grove, (9/20/2017, 7:28 AM)

In Fig.1, what is the darker layer at the interface to the substrate? Is it similar to the Gamma layer or Delta layer in HDG? Excellent article!


Comment from Kenichi Nakamura, (9/20/2017, 9:07 PM)

I can not explain that correctly, but I found some chemical interaction there by analyses. I would like to figure out that in a next article. Thank you for the motivating comment.


Comment from Christian Favennec, (9/21/2017, 12:35 AM)

Good article and interesting approach. Which kind of CCT do you use, and what salt concentration? Did you perform any comparative adhesion test between HDG and coating, and any electrochemical test to evaluate electrochemical potential evolution? Did you evaluate the Influence of roughness and cleanliness on the coating performance? it could also be interesting to evaluate the performance in comparaison with solvent base rich paints.


Comment from Kenichi Nakamura, (9/22/2017, 2:09 AM)

The condition of CCT is below. 1. Salt spaying 30±2?, 0.5h 2. Moistening 30±2?, 95±3%RH, 1.5h 3. Hot air drying 50±2?, 2h 4. Warm air drying 30±2?, 2h (1?2?3?4?1..) Salt concentration is 5wt%. Adhesion strength of the coating is much weeker than HDZ, but it is about 10MPa. The electrochemical potential of the coating is almost the same as that of HDZ: -950mV. The anti-corrosion performance of the coating is influenced by roughness or cleanliness. Ideally speaking, more than 25µm of roghness and SP10 of cleanliness are recommended. Both waterbased and solvent type have almost the same anti-corrosion performance. Thank you for the pointed question.


Comment Join the Conversation:

Sign in to our community to add your comments.

Advertisements
 
Jotun Paints Inc.
 
Jotun Jotachar 1709
 
Mesh-free passive fire protection epoxy designed to protect against hydrocarbon pool fire scenarios for up to four hours as defined in the ANSI/UL1709 standard.
 

 
Carboline Company
 
New product: Carbozinc® 608 HB
 
Introducing a new high build zinc-rich primer that can save you time and money by eliminating the epoxy intermediate coat!
 

 
SAFE Systems, Inc.
 
Enduroguard -
The Tough Cable
for a Tough Industry.
 
Reduce maintenance costs and down time, increase job site safety with Enduroguard Cable. Available exclusively from SAFE Systems. UL listed, flexible, abrasion resistant and cut resistant.
 

 
Tarps manufacturing, Inc.
 
QUALITY MADE IN AMERICA —Available near you!
 
CLICK to get a behind-the-scenes look at how Tarps Manufacturing makes the highest-quality tarps right here in the USA — available nationwide.
 

 
Mitsubishi Gas Chemical America
 
Performance Amine 1,3-BAC
 
A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.
 

 
ARC / A.W. Chesterton Company
 
Superior Impact & Wear Resistant Lining
 
100% solids, impact resistant, ceramic reinforced, epoxy/urethane hybrid lining for severe abrasive wear and impact resistance.
 

 
Modern Safety Techniques
 
Modern Safety Techniques
 
With our unique LTCat, we can help to provide clean, safe breathing air to your workers. Take a look at our Breathing Air Systems, we supply at least twice as much charcoal as our competitors! Modern
 

 
Sauereisen, Inc.
 
SewerGard® 210XHB
 
• 300 mils in a single coat by plural component equipment
• Fast Setting
• 100% Solids Epoxy
• Chemical-resistant barrier for municipal wastewater environments
sauereisen.com
 

 
Vector Technologies Ltd.
 
The Original Performance Proven Vacuum Solutions
 
VecLoader® 616 Double Dump, Continuous Vacuum, 170 HP w/ 2,400 CFM & 28” Hg. 33% More Efficient than traditional vacuum systems! Choose Vector for the most powerful and the most reliable trailer mounted vacuums in the industry! Email us at: inquiry@vector-vacuums.com or call us at: 800-832-4010
 

 
CHLOR*RID International Inc.
 
SOLUTIONS THAT WORK
 
Companies that invest in corrosion control use CHLOR RID products
  • Soluble salt removal liquid
  • Test kits to verify contamination levels
  • Surface passivation to hold the blast
INFO@CHLOR-RID.COM 800.422.3217
 

 
 
 
 

Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us